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प्रश्न
When does a force do work?
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उत्तर
A force does work whenever there is a displacement in the direction of force applied.
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संबंधित प्रश्न
A boy weighing 40 kgf climbs up a stair of 30 steps each 20 cm high in 4 minutes and a girl weighing 30 kgf does the same in 3 minutes. Compare:
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- The power developed by them.
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1) Name the force exerted by the table top
2) What is the direction of the force?
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Differentiate between work and power.
Is it possible that no transfer of energy may take place even when a force is applied to a body?
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State the condition when the work done by the force is negative.
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For the following scenario, state whether the work done by gravity is positive, negative, or zero.
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For the following scenario, state whether the work done by gravity is positive, negative, or zero.
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